/Engine/Source/Runtime/Core/Public/Containers/UnrealString.h
Replace all occurrences of a substring in this string
a copy of this string with the replacement made
[FString](API\Runtime\Core\Containers\FString) Replace ( const TCHAR * From, const TCHAR * To, [ESearchCase::Type](API\Runtime\Core\Misc\ESearchCase__Type) SearchCase ) const